Category: Water – Based Paints

Water-Based Paints For Whitening Home

Water Based Home Painting Portland

I’m not telling you that there are no solvent-based paints in Portland, but the problems they cause are such (pollution, stench, VOC, low breathability) that they are practically no longer used.

In any case, not all water-based paints are the same. Here we will see those mainly spread according to the needs and characteristics. It is understood that we are interested in the version for whitewashing the house, that is, those that give a white finish. Which, however, are the most widespread.

Tempera paintings

Let’s start with a painting that is not properly considered water-based paint. In reality, water is also the solvent for tempera paints, occupying between 25% and 30% of its total volume.

It was the most used painting until the 1950s and still has a good diffusion today, it is called tempera as it is based on a procedure that involves dissolving (wetting) powder in water. This process was once done by hand, now with a helix drill.

This finish presents some not indifferent problems: both the binders and the pigments are of poor quality as they tend to form a very thick film. In particular, the pigments give the white color more for the thickness than the ability to cover.

The result is a paint that tends to flake or peel off after a short time. It also has the flaw that it cannot be painted over a previous tempera painting. Therefore it is necessary to eliminate it before giving the new finish.

Of course, it has none of the characteristics that are currently required of interior paints, and the only reason it is still widespread is its cheapness and ease of installation.

It is recommended for ceilings or low-traffic areas (cellars and closets). I do not recommend it to any environment.

Portland Breathable water-based paints

Breathable Water-based paints are called transpiring as they allow the wall to let water vapor penetrate (and naturally escape). This might seem a negative feature, while, in reality, it is normal and indeed essential for the health of the walls.

When you buy a breathable water-based paint the main elements that compose it should be the following in these percentages (approximately):

  • Water between 24% and 22%
  • Emulsion (of resins) between 7% and 9%
  • Titanium dioxide between 9% and 10%
  • Kaolin between 8% and 13% (finest white pigment)
  • Calcium carbonate between 50% and 43%

It is good for all rooms where normal use is expected. It might not be recommended, due to the lack of resistance, near the kitchen or in the lower part of the walls of the offices (the chairs hit them constantly …).

Washable water-based paints

Let’s start with the brush strokes parameter that I bet you can’t wait to know: washable water-based paints have to withstand more than 10,000 brush strokes before they start to flourish.

This leads to the average composition of washable paint to be as follows:

  • Water between 25% and 23%
  • ulsion (of resins) between 14% and 19%
  • Titanium dioxide between 10% and 13%
  • White Meudon between 10% and 12%
  • Kaolin between 8% and 13% (finest white pigment)
  • Calcium carbonate between 30% and 17%

As you can see, the percentage of emulsion has increased considerably, particularly doubled compared to a breathable one. In order not to increase costs, a percentage of Bianco Meudon has been added, much cheaper than other pigments, even if it is not always present.…